An implantable strain measurement system designed to detect spine fusion: preliminary results from a biomechanical in vivo study.

Study Design: The strain distribution on the thoracic vertebrae during anteroposterior bending and torsion was examined for use with an implantable strain gauge system and miniature radio transmitter, which also were evaluated.

Objectives: To identify strain gauge placement sites by testing cadaver spines in vivo, and to evaluate an implantable gauge bonding technique and subminiature radio transmitter for accurate strain monitoring.

Summary Of Background Data: Fusion is determined currently through the use of radiographic techniques.